In Mong Kok, one of Hong Kong's most famous and congested shopping districts, hundreds of supporters of Chinese rule on Friday stormed tents and ripped down banners belonging to pro-democracy protesters, forcing many to retreat.

Police formed a human chain in an attempt to separate the two groups. When the barrier did not hold, more police were sent in as reinforcements.

No serious injuries were reported.

Hong Kong pro-democracy protest leaders are calling these "organized" attacks and have threatened to call off talks with government to end the demonstrations if action is not taken to protect the protesters.

Talks being organized

Hong Kong's top civil servant, Chief Secretary Carrie Lam, told The Associated Press on Friday she had begun organizing the talks with the protesters, who have continued their sit-ins after Leung rejected their calls to resign.

"I am indeed very concerned about the clashes we have seen in the streets," Lam said. "Sentiments are running high and there is a high chance of conflict on the streets.

"So I am urging protesters who have been occupying parts of the territory to consider retreating ... so that the police can restore law and order," she said.

The pro-democracy protesters - mainly students - accused the Beijing supporters of coming to the area to cause trouble.

It was unclear if the mob of people in their 30s and older trying to drive away the mostly younger protesters were an organized group. But at least some were local residents fed up with the inconvenience of blocked streets and closed shops. Stern orders by the police to stop blocking the way may have encouraged them to act on their own.

Benny Tai, leader of the broader pro-democracy movement Occupy Central With Love and Peace urged protesters to shift back to the Admiralty area, near the government headquarters, where they began their protests last weekend, for safety's sake.

Tens of thousands of protesters have taken to Hong Kong's streets in the past week to demand full democracy in the former British colony, including a free voting system when they come to choose a new leader in 2017.

The unrest followed heavy rainstorms on Friday that had reduced the number of pro-democracy protesters to just several dozen. Many protesters had also returned to work following a two-day holiday.

Dwindling numbers

Many activists worry authorities will take advantage of the dwindling numbers to clear the protest sites, which have been occupied with tens of thousands of people since last Friday.

Hong Kong leader Leung Chun-ying offered a concession by agreeing to open talks with pro-democracy protesters but refused to stand down. But Beijing restated its resolute opposition to the protests and a completely free vote in Hong Kong.

Beijing, facing separatist unrest in far-flung and resource-rich Tibet and Xinjiang, is unlikely to give way in Hong Kong, fearful that calls for democracy there, especially if successful, will spread to the mainland.

And Financial Secretary John Tsang warned that sustained protests in the city's Central financial center could create “permanent” damage to the Asian financial hub.

China's Communist Party has declared the protests to be illegal and in a state media editorial on Friday warned the campaign of civil disobedience is "doomed to fail."

The front-page editorial in the party-run People's Daily, which generally reflects the central government's views, said there is "no room for concessions" on greater democratic reforms.

The editorial was published after Leung ignored a midnight Thursday deadline to step down, instead proposing talks with a top official on resolving the political crisis.

Cautious of talks

Many protest leaders, including those with the prominent Occupy Central group, have cautiously welcomed the proposed talks, though it is not clear when they will take place.

A possible escalation by the protesters was averted late Thursday when protesters failed to follow through on their threats to occupy government buildings if Leung did not resign. Police had warned they would respond firmly to such a move.

Earlier Friday, some demonstrators held umbrellas for police in the rain while Beijing supporters shouted at police for failing to clear the demonstrators.

“We are all fed up and our lives are affected,” said teacher Victor Ma, 42. “You don't hold Hong Kong citizens hostage because it's not going to work. That's why the crowd is very angry here.”

The protests have been an amalgam of students, activists from the Occupy movement and ordinary Hong Kongers. They have come together under the banner of “Umbrella Revolution,” so called because many of them used umbrellas to ward off pepper spray used by police on Sunday.

The Occupy movement presents one of the biggest political challenges for Beijing since it violently crushed pro-democracy protests in and around Tiananmen Square in 1989.

Brian Padden contributed to this report from Mong Kok. Some material for this report came from Reuters and AP.